# ELSA-2021-9221: Security update for 2 packages

ELSA-2021-9221, released June 1, 2021, fixes 8 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2021-9221
- Platform: Linux
- Released: Jun 1, 2021
- Priority: High (Closes CVE-2021-29266, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2021-9221.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel-uek-container](https://patchblox.com/security/data/product/linux/kernel-uek-container.md) | ol 8 | 0:5.4.17-2102.201.3.el8 |
| [kernel-uek-container-debug](https://patchblox.com/security/data/product/linux/kernel-uek-container-debug.md) | ol 8 | 0:5.4.17-2102.201.3.el8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-29266](https://patchblox.com/security/data/cve/CVE-2021-29266.md) | High | kernel-uek-doc: [5.4.17-2102.201.3uek] - locking/qrwlock: Fix ordering in queued_write_lock_slowpath() (Ali Saidi)  [Orabug: 32805544... | 7.8 | 0.0032 |  |
| [CVE-2021-28038](https://patchblox.com/security/data/cve/CVE-2021-28038.md) | Routine | kernel-uek: [5.4.17-2102.201.3uek] - locking/qrwlock: Fix ordering in queued_write_lock_slowpath() (Ali Saidi)  [Orabug: 32805544... | 6.5 | 0.0071 |  |
| [CVE-2021-29650](https://patchblox.com/security/data/cve/CVE-2021-29650.md) | Routine | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es): * kernel: ou... | 5.5 | 0.0041 |  |
| [CVE-2021-3411](https://patchblox.com/security/data/cve/CVE-2021-3411.md) | Routine | kernel-uek: [5.4.17-2102.201.3uek] - locking/qrwlock: Fix ordering in queued_write_lock_slowpath() (Ali Saidi)  [Orabug: 32805544... | 6.7 | 0.0040 |  |
| [CVE-2021-28971](https://patchblox.com/security/data/cve/CVE-2021-28971.md) | Routine | kernel-rt: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high... | 5.5 | 0.0039 |  |
| [CVE-2021-28950](https://patchblox.com/security/data/cve/CVE-2021-28950.md) | Routine | kernel-rt: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high... | 5.5 | 0.0036 |  |
| [CVE-2021-28688](https://patchblox.com/security/data/cve/CVE-2021-28688.md) | Routine | kernel-uek: [5.4.17-2102.201.3uek] - locking/qrwlock: Fix ordering in queued_write_lock_slowpath() (Ali Saidi)  [Orabug: 32805544... | 6.5 | 0.0034 |  |
| [CVE-2021-28964](https://patchblox.com/security/data/cve/CVE-2021-28964.md) | Routine | kernel-uek: [5.4.17-2102.201.3uek] - locking/qrwlock: Fix ordering in queued_write_lock_slowpath() (Ali Saidi)  [Orabug: 32805544... | 4.7 | 0.0027 |  |

---

Data as of 2026-11-07T06:34:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo